Fire-alarm.



0.1. JENNE.

FIRE ALARM.

APPLICATION FILED FEB. 9. 1917.

1,240,049 Patented Sept. 11,1917.

pzurticuhwly unsln 3011'lpllSS are connected wfh mach (hidl 2116 bymechanism flown 11101 7 lclsco, in and State it known NNE, a crmzcn 0 aresident 0. San

Be J1 T0 all 107mm ma 5 of San Francisco ave invented, cert min new and.

A1 pecificzztion. 011 is an iDP JJOWQFv 1 its object .0

s in Fine- *lng 1s a pl'oveinent folio My immn 10 alarmr, and

has for dcwnw swing Oil stem c pneumntlc featunas enable tron anautomatic m'e electrlc and blned as to Q D l 1 i .i 1 1i p Cu. up U l 1U 0 J I l 1 77C 1 a H H am an v a r nu gp n .1 w 0 DB 6 1 fi t 1H w IL mV 0. 5 1

.13 provided. wlilel'ehy the I'fltI lS W111 luchcate 0 hi abhng 111111to Mther may dew.

Fi 2 id x. 1 1 .w m 1 I 0 MW m 1 1 Q d 1 0 I M w l nm 1 81 .1 1 V C H He Q Q 6 S .l w m m. e n m z w 1.. m n m 3 a 47 D. 7 n 0 1 m m .1 1 1 4oFQB m1 S mm D 5 O 2 3 (went with ' .9 love adj .1 0.11 113% 'ovementover my I-ante tion Is an 1111p. ant, No. 1,168,506

22. while. "5

ol'ked, t1

mm CH C h m 8H t m VP I 5 ms d Jinn m HG @110. the lever is the tuhitntected L: being (he.

and

e lntermls W si g-ned an d adapted abl th spr be] 1'1 hm, by fusin (Yads sand he Y which w. 116. @he. :m of tn. t'h uh. uh

pernnt the. valve :0 from tubin trio-ti 11."

wk. and :1 3

in ihoan anpump i0 11121.1

C the or partially closed when 4 M P I C O 1 I O C L A. Bhul'dun tubesystem by mom ed in conslstnw and are int 1s of a cross ahc erpos iiacts 22 3 the said circu 2/, 11

being at the large and of 1'1 5 O 1 11 5 1 0 .1 i 12 1; d m wl 1 a S I 0Q 0 e 1] v a 1. 1 a 1!. 8 C n C ra-1.1 Y M 6 3. 7 1 CQLER 6 G S F .1 AU00. \J D 3.3 0 :1 w

the lterznechate 1 nected with the other arm.

A pawl 9 is plmted. near H d SH of the tube 4. and i1 1 is connected. to

the

20 until the lever will eventually engage the circuit. The lever,Bourdon tube and cor tact mechanism are arranged within a case, whichis'indicated in dotted lines, a'ndan electrical cnt-out'ifidicated at.35 is provided igconiiection with the casing cover, so arflanged thatthe cut-out will shunt across or reservoir to the enlargement orreservoir 21, and will overbalan'ce that end of the lever which isadjacent to the Bourdon tube contacts 22, completing the circuit throughthe local alarm. The lever 16 is normally balanced to swing downward atthe end remote from the Bourdon tube, and the pawl 9 holds the leveragainst this tendency to swing. As soon as the local circuit is closed,the alarm 28, a bell in the present instance, will be actuated,informing the subscriber that there is a leak, the alarm, however, willbe local and for the subscriber only;

Should one of the sprinkler heads open in case of fire, in the samemanner as the,

ordinary sprinkler head, the pressure in the tubing will be quicklyreleased, and the quick contraction of the Bourdon tube will swin theadjacent end of the lever downw'ar quickly and the pawl will pass theend of the lever, thus releasing the lever, and the heavy end of thelever will reverse this swinging movement of the lever and will causetheend adj acent; to the enlargement 20 to swing downward, and the contacts23 and 23 will close the circuits 27 and 30 thus turning in the alarm,and in addition turn ing in a local alarm. The action of the Bourdontube when there is a sudden decrease in the pressure, will be so quickand the lever will be released so quickly, that therewill not be timefor the mercury to run into the enlargement 21 to overbalance thenormally heavy end of the tube.

The rule joint connection between the awl and the movable sectionpermits the ever;

to pass downward past the pawl, and it will be noticed that the adjacentend of the. lever and the movable section of the pawl are bev eled tofacilitate its movement.

I claim:

1. A fire alarm system comprising a tube extending throughout thestructure to be protected and having fusible plugs carried thereby, andadapted to be supplied with air I above atmospheric pressure, a Bourdontube having at the same end a pair of contact lugs and at the other asingle contact lug, each of the c1rcu1ts'hav1ngterminals for engagementby the pair of lugs when they swing downward to simultaneously close thesaid circuits, and the local circuit having terminals for engagement bythe single lug when the said lever swings downward to close the localcircuit, a pawl engaging above the last named end of the lever andnormally holding the lever balanced, a connection between the pawl andthe blind end of the Bourdon tube for moving said pawl downward to tipthe lever when the pressure in the Bourdon tube is slowly lessened, andto tip and release the lever when the pressure in the tube is suddenlylessened, said lever containing a heavy fluent material adapted to runinto the light end when the lever is slowly tipped to overbalance theheavy end, and means for varying the flow of the said material.

2. A fire alarm system comprising a tube extending throughout thestructure to be protected and having fusible plugs carried thereby, andadapted to be sup lied with air above atmospheric pressure, a ourdontube connecting with the system, a local alarm and a central station, anelectric circuit for the local alarm and an electric circuit for thecentral station, a switch lever pivoted intermediate its ends adjacentto the blind end of the Bourdon tube, said lever having at each end acontact lug, said lever being balanced to swing downward at the endremote from the Bourdon tube, means controlled by the Bourdon tube forholding the lever balanced when the Bourdon tube is expanded underpressure, and for tipping the adjacent end of the lever downward whenthe pressure isgradually released, and for tiphavingterminals forengagement by the said adjacent end of the lever for closing the same,and the central station circuit having terminals for engagement by theother lug.

C RISTIAN JENNE.

lVitnesses C. A. Bow: Ar 0, C. R. Ynmsnnr.

